12" X 30" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Drop Ceilings / Steel + Product Details Size – Suitable for all AC 8in diameter 12125SDCLNGBX

+ Product Details Size – 20"w X 14"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 36"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 18" or 18" x 12" duct opening (measured at the opening)

Easy Cutting – Offset and Spring Loaded design for easy

12" X 30" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER EASY AIRFLOW LINEAR BAR GRILLES Drop Ceilings Steel + Product Details Size – Suitable for all AC 8in diameter 12125SDCLNGBX + Product Details Size – 20"w X 14"h is the size for the duct opening measurement only + Product Details Size 32"w X 36"h is the size for the duct opening measurement only